interface Child {
  height: number;
  weight: number;
  iq: number;
  eq: number;
}

/* 生理特征类 = 从Child类中摘录所有的生理指标 */
type BodyMap = Pick<Child, "height" | "weight">;

/* 心理特征类 = 从Child类型中排除掉所有生理指标 */
type MentalMap = Omit<Child, "height" | "weight">;
